Sorting the washing helps children to understand that there are different ways that we can describe, group and classify clothing. We can sort the washing by size, type of clothing, who the clothing belongs to or by season.
Sorting helps children to notice the different attributes of an object and that we use these attributes to describe them.
When your child helps you to sort the washing they are listening to instructions, using size and colour and patterns. Listening to and following instructions helps your child to develop mathematical language and to understand that language helps us to know what to do.